- Concise Routledge encyclopedia of philosophy. New York: Routledge, 2000. R100 C58 netLibrary eBook
- The Encyclopedia of philosophy. 8 vol. plus 1996 supplement. New York: Macmillan, 1972. R103 Ed98 1972
- Philosophical dictionary. Amherst, N.Y.: Prometheus Books, 2003. R190 B765
- The Oxford dictionary of philosophy. New York: Oxford University Press, 1996. netLibrary eBook
- Who's who in the history of philosophy. Philosophical Library, 1965. R109.22 K5

